Has anyone swapped out their H2 sway bars for a new set of 2500HD bars? I'm curious if they are the same or if the HD bars are a tad stiffer? I bought mine used and it supposedly already has keys. It is cranked to sit level and I don't have much more thread on the bolts. I'm wondering if I really don't have upgraded lift keys or if my t-bars are simply aged...

Thanks,
Todd